Can you provide a comparison of the advantages and disadvantages of Off-line, Line-interactive and On-line UPS?

Can you provide a comparison of the advantages and disadvantages of Off-line, Line-interactive and On-line UPS?

Sure, please find below a quick summary. For more detailed explanations, please refer to the questions above.

Topology

Benefits

Limitations

Value proposition

Off-line/Standby

Low cost, high efficiency (typically 95 – 98%), compact Uses battery during brownouts, limited or no protection against power irregularities, impractical over 2KVA Best value for Personal Computers

Line Interactive

High reliability, high efficiency (typically 90-96%), reasonable voltage conditioning Impractical over 5KVA, does not protect against all forms of power irregularities Most popular UPS – ideal for for small office, web and departmental servers and/or harsh power environments

On-line (Double Conversion)

Near ideal electrical output, highest protection against all power irregularities, ease of paralleling Lower efficiency (typically 80 – 90%), relatively more expensive under 5kVA Default choice for providing back-up power and protection to mission critical equipment and servers at data centers

To learn about the working principle of an Offline UPS click here

To learn about the working principle of a Line interactive UPS click here

To learn about the working principle of an Online UPS click here

 

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